I recommend caution. Smith was a famous and charismatic Arminian Holiness Movement preacher/teacher and is not in agreement with our Reformed theology AT ALL. She taught Higher Life n Keswick sanctification and if Im not mistaken 2nd blessing theology, all descended from the Wesleyan Methodist Movement. All beliefs the Reformed reject. She's famous for her preaching/teaching and her famous book: The Christians Secret of a Happy Life, a blend of Holiness theology n mysticism. She fell away from the faith and became a Christian Universalist.
The two books both titled "5 Views of Sanctification" show us the different theologies. Also JI Packer wrote against the danger of Keswick in his books. And I believe Andy Nasalli (of MacArthur/Masters) wrote two books against this theology:
Andrew David Naselli
No Quick Fix: Where Higher Life Theology Came From, What It Is, and Why It's Harmful
https://en.m.wikipedia.org/wiki/Hannah_Whitall_Smith